Step 2 of 33/25Correctreported that small businesses spend 29 hours a week marketing their business. A local chamber of commerce claims that small busibecause these businesses are spending less than 29 hours a week on marketing. The chamber conducts a survey of 98 small businesne average amount of time spent on marketing is 27.6 hours a week. Assuming that the population standard deviation is 8.1 hours, isport the chamber of commerce's claim at the 0.01 level of significance?mpute the value of the test statistic. Round your answer to two decimal places.27.6Ta

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Answered: correct eported that small businesses…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The heights of adult men in America are normally distributed, with a mean of 69.7 inches and a standard deviation of 2.64 inches. The heights of adult women in America are also normally distributed, but with a mean of 64.2 inches and a standard deviation of 2.53 inches. What percentage of men are SHORTER than 70 inches? Round to nearest tenth of a percent. What percentage of women are TALLER than 59 inches? Round to nearest tenth of a percent. Submit Question 96
According to a marketing website, adults in a certain country average 51 minutes per day on mobile devices this year. Assume that minutes per day on mobile devices follow the normal distribution and has a standard deviation of 7 minutes. What amount of time spent today on mobile devices by an adult represents the 80th percentile?
The tallest living man at one time had a height of 243 cm. The shortest living man at that time had a height of 127.5 cm. heights of men at that time had a mean of 170.52 cm and a standard deviation of 6.62. Which of these two men had the height that was more extreme? Use z scores
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 66 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 51 miles per hour and 81 miles per hour. (Assume the data set has a bell-shaped distribution) Approximately% of vehicles travel between 51 miles per hour and 81 miles per hour.
Most medical schools require applicants for admission to take the Medical College Admissions Test (MCAT) examination. Scores on the MCAT are roughly normally distributed with a mean of 500 and a standard deviation of 10.6. What percentage of students score above 518 points? ( write as a decimal and round to the nearest hundredth)
A vending machine dispenses coffee into a twelve-ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.04 ounce. You can allow the cup to overfil 3% of the time. What amount should you set as the mean amount of coffee to be dispensed? Cik to View ongn 1.o the table Click to view. Dagn 2.of the tabin. Dounces (Round to two decimal places as needed.)
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 65 miles per hour, with a standard deviation of 4 miles per hour. Estimate the percent of vehicles whose speeds are between 57 miles per hour and 73 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately % of vehicles travel between 57 miles per hour and 73 miles per hour.
JU UI LIle uala Values will fall within 3 standard deviations of the mean. 15. A report stated that the average number of times a cat returns to its food bowl during the day is 15.2. Suppose that the data is approximately bell-shaped with a standard deviation of 4.16. a. What percentage of cats would return to their food bowl between 2.72 and 27.68 times per day? b. Now, assume the data is NOT bell-shaped. What percentage of cats would return to their food bowl between 2.72 and 27.68 times per day? Use Chebyshev's Theorem.
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway per hour and 85 miles per hour. (Assume the data set has a bell-shaped distribution.) 70 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whese speeds are between 55 miles Approximately% of vehicles travel between 55 miles per hour and 85 miles per hour.
Butt-to-knee length is approximately normally distributed with a mean of 23.1 inches and a standard deviation of 1.2. Theater seats are designed to be comfortable for as many adults as possible. If the seats are required to fit the middle 80% of the population, the seat must be comfortable for what butt-to-knee length range?
Suppose the mean number of candies in a standard vending machine bag is 47.6 with a standard deviation of 1.3 . assume that the number of candies is normally distributed what percentage of bags have less than 45 candies?
eText Contents A credit score measures a person's creditworthiness. Assume the average credit score for Americans is 687. Assume the scores are normally distributed with a standard deviation of 46. Study Plan al Determine the interval of credit scores that are one standard deviation around the mean. Video & Resout b) Determine the interval of credit scores that are two standard deviations around the mean. c) Determine the interval of credit scores that are three standard deviations around the mean. Library a) The interval of credit scores that are one standard deviation around the mean ranges from to Accessible Resi (Type integers or decimals. Use ascending order.) Purchase Optic Communicatio Enter your answer In the edit flelds and then click Check Answer (? parts remaining CicckAnswer O Type here to search F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 PriSc Numlk DIO Sar Lk SysRq % 7 7 3 4 8. € 6 9. E R Tab 4. sLock D K

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